Synonym: absurd, inconceivable, unimaginable, unthinkable. Antonym: possible. Similar words: possible, as soon as possible, possibility, permissible, accessible, inexpressible, impose, visible. Meaning: [ɪm'pɑsəbl /-'pɒs-] 
n. something that cannot be done. adj. 1. not capable of occurring or being accomplished or dealt with 2. totally unlikely 3. used of persons or their behavior.
n. something that cannot be done. adj. 1. not capable of occurring or being accomplished or dealt with 2. totally unlikely 3. used of persons or their behavior. 
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121. It is impossible to transmute base metals into gold.
122. The government inherited an impossible situation from its predecessors.
123. It's impossible to get me to step out.
124. It is impossible to predict who will win.
125. It's impossible to predict what will happen next.
126. She flatly dismissed the idea as impossible.
127. It is impossible to count up to infinity.
128. It's impossible to know in advance what will happen.
129. Surely true objectivity in a critic is impossible?
130. It would be impossible to change his mind.
131. It was impossible to separate the rival fans.
132. It' s impossible to read his microscopic handwriting.
133. It's impossible for me to leave my family.
134. The signature was smudged and impossible to decipher.
135. I mean that it is impossible.
136. He made it impossible for me to say no.
137. It's impossible if you stick to the rules.
138. It's impossible for me to say.
139. She found it impossible to eat lightly.
140. It's absolutely impossible to work with all this noise.
141. Our task borders on the impossible.
142. It is impossible to honor her with the award.
143. The risks to health are impossible to quantify.
144. It's almost impossible to climb up the cliff.
145. It's almost impossible to tell the twins apart.
146. He's impossible to work for - he's so disorganized.
147. The language barrier makes debate impossible.
148. Many regard his task as mission impossible.
149. It's impossible to get there in time.
150. I found his offer impossible to resist.
More similar words: possible, as soon as possible, possibility, permissible, accessible, inexpressible, impose, visible, feasible, ostensible, comprehensible, be responsible for, sibling, compose, fossil, ostensibly, import, composure, impolite, composition, importune, important, Bible, importantly, foible, of importance, impoverishment, fungible, eligible, horrible.